论文部分内容阅读
本文通过对长江口及邻近陆架区12个站位的柱状沉积物、间隙水和细菌资料分析,指出了研究区沉积物和间隙水中铁的分布特征,并与细菌、地质资料对比研究、从生物地球化学角度对间隙水中铁的来源及其控制因素作了初步探讨。资料研究表明,沉积物中铁主要赋存于细粒沉积物中,腐植酸中铁由河口向陆架减少。间隙水中铁主要来自沉积物中高价铁,在弧菌科(Vibrionaceae)和假单孢菌属(Pseudomonas)细菌的媒介下,参加了沉积物中某些有机物的降解反应,接收了有机物的电子后被还原,其含量和分布主要受控于参加媒介作用的细菌。
Based on the analysis of columnar sediment, interstitial water and bacteria data at 12 stations in the Yangtze Estuary and its adjacent shelf area, the distribution characteristics of iron in sediment and interstitial water of the study area are pointed out. Compared with the bacterial and geological data, Geochemical perspective on the source of interstitial water and its control factors were discussed. Data studies show that the sediments of iron mainly occur in fine sediments, iron in humic acid decreased from the estuary to the shelf. Iron in interstitial water comes mainly from high-valent iron in sediments and participates in the degradation reaction of some organic matter in sediments under the mediation of Vibrionaceae and Pseudomonas bacteria. After receiving the electron of organic matter Was reduced, its content and distribution are mainly controlled by the bacteria involved in the role of the media.